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NEETZoologyPrinciples of Inheritance and Variation

Select the incorrect statement for the given figure.

Options

  1. AThe affected individual is short statured with small round head, furrowed tongue and partially open mouth
  2. BThe affected individual do not suffer from heart diseases.
  3. CThe affected individual has many “loops” on finger tips.
  4. DPalm is broad with characteristic palm crease.

Correct answer

B. The affected individual do not suffer from heart diseases.

Step-by-step solution

Down’s Syndrome : The cause of this genetic disorder is the presence of an additional copy of the chromosome number 21 (trisomy of 21). This disorder was first described by Langdon Down (1866). The affected individual is short statured with small round head, furrowed tongue and partially open mouth (Figure 4.16). Palm is broad with characteristic palm crease. Physical, psychomotor and mental development is retarded.

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